the informal super-government otherwise known as the post-RT establishment has called the shots the whole time.
This is a paranoid fantasy. Repeating it like a mantra won't make it true.
effectively shut out average Poles from such opportunities
Your complaint is not against cronyism but the idea that the wrong group of cronies is in power. Meanwhile I know lots of Polish people with no ties to either Solidarity or PZPR who have done just fine in post-communist Poland.
As I said Poland is now in an income trap. In any rapidly developing country there comes a time when income is lower than it should be because of structural economic reasons. A country in that position either finds a way forward allowing incomes to Grow (Japan, Germany) or through unrest halts development so that incomes fall back to pre-development levels (Latin America, Greece, Portugal).
You're in favor of stopping development so that the whole country can settle back into equitable poverty.